Change STM32L475/76/86 GCC_ARM linker files to have HEAP in SRAM1 and stack in SRAM2 (after the interrupt vector)

Author: adustm

targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L475xG/device/TOOLCHAIN_GCC_ARM/STM32L475XX.ld

@@ -139,24 +139,29 @@ SECTIONS
         __end__ = .;
         end = __end__;
         *(.heap*)
+        . += (ORIGIN(SRAM1) + LENGTH(SRAM1) - .);
         __HeapLimit = .;
     } > SRAM1
-
+    PROVIDE(__heap_size = SIZEOF(.heap));
+    PROVIDE(__mbed_sbrk_start = ADDR(.heap));
+    PROVIDE(__mbed_krbs_start = ADDR(.heap) + SIZEOF(.heap));
+    /* Check if data + heap exceeds RAM1 limit */
+    ASSERT((ORIGIN(SRAM1)+LENGTH(SRAM1)) >= __HeapLimit, "SRAM1 overflow")
     /* .stack_dummy section doesn't contains any symbols. It is only
      * used for linker to calculate size of stack sections, and assign
      * values to stack symbols later */
     .stack_dummy (COPY):
     {
         *(.stack*)
-    } > SRAM1
+    } > SRAM2
 
     /* Set stack top to end of RAM, and stack limit move down by
      * size of stack_dummy section */
-    __StackTop = ORIGIN(SRAM1) + LENGTH(SRAM1);
+    __StackTop = ORIGIN(SRAM2) + LENGTH(SRAM2);
     _estack = __StackTop;
     __StackLimit = __StackTop - SIZEOF(.stack_dummy);
     PROVIDE(__stack = __StackTop);
+    /* Check if stack exceeds RAM2 limit */
+    ASSERT((ORIGIN(SRAM2)+LENGTH(SRAM2)) >= __StackLimit, "SRAM2 overflow")
 
-    /* Check if data + heap + stack exceeds RAM limit */
-    ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
 }

targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L476xG/device/TOOLCHAIN_GCC_ARM/STM32L476XX.ld

@@ -139,24 +139,29 @@ SECTIONS
         __end__ = .;
         end = __end__;
         *(.heap*)
+        . += (ORIGIN(SRAM1) + LENGTH(SRAM1) - .);
         __HeapLimit = .;
     } > SRAM1
-
+    PROVIDE(__heap_size = SIZEOF(.heap));
+    PROVIDE(__mbed_sbrk_start = ADDR(.heap));
+    PROVIDE(__mbed_krbs_start = ADDR(.heap) + SIZEOF(.heap));
+    /* Check if data + heap exceeds RAM1 limit */
+    ASSERT((ORIGIN(SRAM1)+LENGTH(SRAM1)) >= __HeapLimit, "SRAM1 overflow")
     /* .stack_dummy section doesn't contains any symbols. It is only
      * used for linker to calculate size of stack sections, and assign
      * values to stack symbols later */
     .stack_dummy (COPY):
     {
         *(.stack*)
-    } > SRAM1
+    } > SRAM2
 
     /* Set stack top to end of RAM, and stack limit move down by
      * size of stack_dummy section */
-    __StackTop = ORIGIN(SRAM1) + LENGTH(SRAM1);
+    __StackTop = ORIGIN(SRAM2) + LENGTH(SRAM2);
     _estack = __StackTop;
     __StackLimit = __StackTop - SIZEOF(.stack_dummy);
     PROVIDE(__stack = __StackTop);
+    /* Check if stack exceeds RAM2 limit */
+    ASSERT((ORIGIN(SRAM2)+LENGTH(SRAM2)) >= __StackLimit, "SRAM2 overflow")
 
-    /* Check if data + heap + stack exceeds RAM limit */
-    ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
 }

targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L486xG/device/TOOLCHAIN_GCC_ARM/STM32L486XX.ld

@@ -131,24 +131,29 @@ SECTIONS
         __end__ = .;
         end = __end__;
         *(.heap*)
+        . += (ORIGIN(SRAM1) + LENGTH(SRAM1) - .);
         __HeapLimit = .;
     } > SRAM1
-
+    PROVIDE(__heap_size = SIZEOF(.heap));
+    PROVIDE(__mbed_sbrk_start = ADDR(.heap));
+    PROVIDE(__mbed_krbs_start = ADDR(.heap) + SIZEOF(.heap));
+    /* Check if data + heap exceeds RAM1 limit */
+    ASSERT((ORIGIN(SRAM1)+LENGTH(SRAM1)) >= __HeapLimit, "SRAM1 overflow")
     /* .stack_dummy section doesn't contains any symbols. It is only
      * used for linker to calculate size of stack sections, and assign
      * values to stack symbols later */
     .stack_dummy (COPY):
     {
         *(.stack*)
-    } > SRAM1
+    } > SRAM2
 
     /* Set stack top to end of RAM, and stack limit move down by
      * size of stack_dummy section */
-    __StackTop = ORIGIN(SRAM1) + LENGTH(SRAM1);
+    __StackTop = ORIGIN(SRAM2) + LENGTH(SRAM2);
     _estack = __StackTop;
     __StackLimit = __StackTop - SIZEOF(.stack_dummy);
     PROVIDE(__stack = __StackTop);
+    /* Check if stack exceeds RAM2 limit */
+    ASSERT((ORIGIN(SRAM2)+LENGTH(SRAM2)) >= __StackLimit, "SRAM2 overflow")
 
-    /* Check if data + heap + stack exceeds RAM limit */
-    ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
 }